Finally got around to checking into the camera's issue. Since about two weeks ago the camera had no image at all, but I could log into it and adjust settings etc; obviously not an issue with the network connection or other electronic functions. I took the unit all apart and found one broken black wire between the main circuit board and the camera board. There are several header plugs, but the one with the black wires going to it had the trouble. I suspect that the wire just wore out from flexing, or got pinched during assembly, or maybe both. The rest of the wiring seems to be ok. Soldered and shrink-tubed the connection and taped that particular sub-harness with some super-88 (really flexible electrical tape) to minimize stresses on the cable and re-assembled the unit. All working like new now again.
I did run into one minor issue with re-assembly; I must have touched the camera lens with my greasy fingers

(you don't have to remove it, the headers on the circuit board are accessible without doing so ) and when it booted up it looked like the camera was under water or something like that. It was really ugly. Some lens cleaner and micro-fiber cloth and good to go!
First pic shows broken/crushed wire. second pic shows headers on camera circuit board, the header with the broken wire was at the bottom horizontal in the image, under the red harness.
The camera was relatively easy to dis-assemble and put back together, but I have been working on these sort of electronic devices for many years. If you aren't sure of your abilities, don't have adequate
tools, or are not sure how to solder small components, then I would recommend not doing this sort of repair yourself. Maybe you have warranty on your camera and should send it back for replacement. Good luck!
-G.